我想向状态为ORDERED的每一行添加删除按钮。我尝试了不同的变化。即使data [i]没有未定义,该解决方案也可以正常工作,不会出现错误“无法读取未定义的属性'id'”。 .click()给出正确的ID之前发出警报。怎么了我可以在这里做些不同的事情还是做得更好?

).done( (data, status, jqXHR) => {
        if(data[0].order_username != undefined) {
            $("#orders_table").empty();
            for(var i = 0; i < data.length; i++) {
                var button = "";
                if(data[i].status == "ORDERED") {
                    button = "<td><button class='delete'>Delete</button></td>";

                }

                $("#orders_table").append(
                    "<tr>" +
                    "<td>" + data[i].order_username + "</td>"+
                    "<td>" + data[i].work_description + "</td>" +
                    "<td>" + dateFormatter(data[i].orderdate) + "</td>" +
                    "<td>" + dateFormatter(data[i].startdate) + "</td>" +
                    "<td>" + dateFormatter(data[i].readydate) + "</td>" +
                    "<td>" + dateFormatter(data[i].accepteddate) + "</td>" +
                    "<td>" + dateFormatter(data[i].denieddate) + "</td>" +
                    "<td>" + data[i].comment_of_work + "</td>" +
                    "<td>" + data[i].hours + "</td>" +
                    "<td>" + data[i].approx_budget + "</td>" +
                    "<td>" + data[i].status + "</td>" +
                    button +
                    "</tr>"
                )

                alert(data[i].id);
                $(".delete").click(() => {
                    deleteUser(data[i].id);
                })
            }
        }

        function deleteUser(key) {
            $.ajax(
            {
                url: "http:localhost:3001/workorders_delete/"+key,
                method: 'delete'
            }).done( (data, status, jqXHR) => {

            }).fail( (jqXHR, status, errorThrown) => {
                console.log("Call failed: "+errorThrown);
            });
    }

最佳答案

您可以使用响应数据中的ID为删除按钮设置唯一的数据属性,如下所示:

 if(data[i].status == "ORDERED") {
     button = "<td><button class='delete' data-deleteId =
              "+data[i].id+">Delete</button></td>";
 }


然后您可以为删除按钮编写一个单击事件侦听器,如下所示:

$(".delete").click(function(){
    var id = $(this).data("deleteId");
    deleteUser(id);
});


在您的代码中:-

  $(".delete").click(() => {
    deleteUser(data[i].id);
  });


单击时将调用或执行函数deleteUser(),此时不会定义data [i] .id。

07-24 09:22